含锰复合氧化物同步吸附砷、磷的界面调控机制与强化除砷原理

项目名称： 含锰复合氧化物同步吸附砷、磷的界面调控机制与强化除砷原理

项目编号： No.51208415

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 建筑环境与结构工程学科

项目作者： 吴鹍

作者单位： 西安建筑科技大学

项目金额： 28万元

中文摘要： 吸附法是治理地下水砷(As)污染的有效方法之一，在砷、磷（P）复合污染条件下如何提高吸附材料对As特别是三价砷[As(III)]的专性吸附效能是除砷技术面临的重要难题。本研究将以含锰复合氧化物与As、P的形态作用关系为基础，围绕As(III)氧化/吸附和As、P竞争吸附的不同微界面反应过程，采用"氧化-共沉淀"法制备不同的含锰复合氧化物并对其表面位点进行功能表达和修饰，探明"氧化/吸附"界面同步去除As(V)/As(III)和P的动态过程和水质作用要素；利用原位傅里叶变换红外光谱、原位拉曼光谱、X射线电子能谱等多种表征手段，阐明吸附材料在吸附As、P前后的结构性质变化特征，揭示As形态转化对As、P在"氧化/吸附"界面的竞争吸附机制的作用效应，提出采用含锰复合氧化物共去除As、P的技术原理，为实现As、P复合污染条件下对复合功能材料强化除As的有效调控提供科学依据和理论基础。

中文关键词： 复合氧化物；砷；磷；吸附；氧化

英文摘要： Adsorption technology is one of the most effective methods for removing arsenic (As) from groundwater. However, the poor performance for removing As (especially arsenite [As(III)]) under the combined pollution conditions of As and phosphate (P) is a difficult problem in the application of adsorption technology. In this study, we will prepare several kinds of Mn-oxide-containing binary oxides (MOCBOs) through an oxidation-coprecipitation process, and used them as adsorbents for removing As(III)/As(V) and P simultaneously. This research will be concentrated on the various micro-interface reaction processes, including the oxidation-adsorption process of As(III) and the competitive adsorption process of As and P. We will make efforts to analyze the functions and the transformation of the active sites on the surfaces of MOCBOs during these reaction processes, and then modify the chemical constitutions of these adsorbents for better As/P removal performances. Afterwards, we will try to reveal the dynamic processes for removing As(III)/As(V) and P at the composite interfaces, which could exhibit the capacities for both oxidation and adsorption. Several surface characterization methods, such as in-situ Fourier Transform Infrared Spectrometer (FTIR), in-situ Raman spectra, X-ray photoelectron spectroscopy (XPS) etc., wil

英文关键词： binary oxide；arsenic；phosphorus；adsorption；oxidation